@deftypefun {void} {gnutls_fips140_set_mode} (gnutls_fips_mode_t @var{mode}, unsigned @var{flags})
@var{mode}: the FIPS140-2 mode to switch to

@var{flags}: should be zero or @code{GNUTLS_FIPS140_SET_MODE_THREAD} 

That function is not thread-safe when changing the mode with no flags
(globally), and should be called prior to creating any threads. Its
behavior with no flags after threads are created is undefined.

When the flag @code{GNUTLS_FIPS140_SET_MODE_THREAD}  is specified
then this call will change the FIPS140-2 mode for this particular
thread and not for the whole process. That way an application
can utilize this function to set and reset mode for specific
operations.

This function never fails but will be a no-op if used when
the library is not in FIPS140-2 mode. When asked to switch to unknown
values for  @code{mode} or to @code{GNUTLS_FIPS140_SELFTESTS}  mode, the library
switches to @code{GNUTLS_FIPS140_STRICT}  mode.

@strong{Since:} 3.6.2
@end deftypefun